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A sensor is the digital camera's equivalent to film. It contains millions of tiny light-detecting areas called photosites, which convert light into an electric charge. After exposing the sensor to light, this charge is read from each pixel and converted into a digital image.

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4
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1answer
450 views

What is the native color gamut of a modern digital sensor?

What is the area of CIE 1931 diagram that is being covered by contemporary digital camera sensors? I can find triangles for LCD panels being comapred to sRGB and aRGB and ProPhoto. There are always ...
64
votes
7answers
8k views

What am I photographing INSIDE my camera?

I've been experimenting with low light photography. I've photographed something weird inside my camera and don't really know what it is. This is the image initially taken... Seems inoccuious ...
5
votes
4answers
457 views

What *exactly* is white balance?

When setting a white balance configuration, we adjust the temperature and green-magenta shift to a wavelength-intensity distribution of light that correlates most closely with the actual distribution ...
15
votes
3answers
892 views

Is there any point in using automatic sensor cleaning on my DSLR even if I never remove the lens?

I only own one lens for my camera (Canon EOS 60D), and I never take it off. Is there still any point in having the standard automatic sensor cleaning done on power on?
1
vote
1answer
195 views

Why do I get white images with black vertical stripes?

Apparently my 3 year old Canon EOS 550D is fed up with my style of photography and decided to explore abstract arts instead. All it shows on the LCD and stores on the SD card is this: When I ...
9
votes
1answer
631 views

How can I find the sensor position on my camera? [duplicate]

In terms of post production I need to measure the exact distance from the camera sensor to several objects on the set. Where I can find specifications to determine the sensor position of a canon ...
1
vote
0answers
27 views

Relationship between the focal length and sensor size [duplicate]

What is a relationship between the focal length of the lens and the sensor size to achieve the same image area ?
5
votes
1answer
258 views

What do “dark current” and “sensitivity” mean for a camera module?

I am looking at a camera module to be used for a project which deals in shooting frames in dark areas and night conditions. This is a camera used from a circuit board. I have the following light ...
0
votes
0answers
234 views

Are mobile phone camera lenses good enough to support 20MP sensors?

With mobile phone cameras approaching 20 MP while maintaining small sensor sizes, pixels dimensions are typically around 1 μm or lower. What about the lenses? Are they good enough to produce an Airy ...
2
votes
2answers
192 views

Why don't sensors on satellites and rovers degrade as quickly as DSLRs on the space station?

I just saw a report on NASA TV that said that dSLR cameras are replaced every 12 to 18 months because of the large number of dead and hot pixels, but video cameras last much longer, and they were ...
2
votes
2answers
430 views

CCD sensors use a digital shutter. Why don't the more expensive CMOS sensors?

This answer mentions that CMOS sensors "cannot" use digital shutters where as CCD sensors can. Even if some models have the ability to, it is certainly typically for CMOS sensors to use mechanical ...
1
vote
1answer
152 views

General guidelines on choosing a lens for an image sensor [closed]

Not sure if this is the right place to ask this question, but here it is: I am trying to get up and running a VGA image sensor: 2755um x 2050um image area with 4.2um x 4.2um pixels and 640x480 ...
0
votes
1answer
187 views

Why is my Canon Digital IXUS/ELPH making distorted photos with purple cast

My ~10 year old Canon PowerShot Digital ELPH S410 (IXUS 430) has been left in a drawer for the past 6 years. I took it out recently to give to my young son as his first camera, but the pictures have ...
2
votes
2answers
654 views

How to estimate camera sensor size?

I am using a smartphone for capturing photos and I need to estimate the camera sensor size (mm*mm). I have the resolution (in pixels) and the focal length (in pixels). I can also measure the size of ...
3
votes
2answers
860 views

Background blur vs. frozen object in long exposure flash photography

I recently watched Adorama's video on rear curtain sync flash photography. At 4.12 to 4.42, the presenter claims that when using front-curtain sync, the background/long exposure blur will be put on ...
0
votes
1answer
226 views

How does long exposure photography work on digital cameras?

For analog photography it's pretty easy, the film is exposed to light during the exposure time, but what about digital sensors ? As far as I know a sensor can't "be exposed" for a long period of ...
1
vote
2answers
215 views

Big sensor and landscape photography, DoF

I've been an owner of point & shot cameras for some years. Now, I'm considering to move to bigger sensor cameras (4/3, asp-c) because I really hate the noise that small sensors produce on low ...
2
votes
3answers
3k views

Does the Canon EOS Rebel T5/1200D have any dust related problems?

I’m planning on purchasing the Canon EOS Rebel T5/1200D very soon. It’s the only DSLR that fits my budget (other one is the Nikon D3100 which I don't plan to get). I like everything about the camera ...
0
votes
0answers
92 views

Auto Capture with Camera - Sensor Activated

I have a camera challenge that I'm trying to solve. Are there ways to configure a camera to take images automatically, upon the the target being in a specified location? For example see, the video ...
20
votes
6answers
14k views

Are Nikon DSLR sensors actually better than Canon's?

I've been a happy Canon user for a while. When I was doing my initial research on what brand to buy several years ago, I came to the conclusion that both Nikon and Canon are equally good (which I ...
1
vote
0answers
305 views

Is it normal for the Canon 6D to exhibit more color noise compared to a 50D?

My first day with 6D, upgraded from a 50D. Wouldn't be pixel-peeping but something unusual caught my eye when I opened photos in Lightroom this morning. The color noise pattern is completely different ...
3
votes
0answers
168 views

Why is there a grid pattern of darker pixels in this twilight sky flat field? [closed]

This is the first time that I'm really inspecting the calibration images we were taught to take/use during data reduction, and I've noticed something in all the flat fields. The image below clearly ...
2
votes
1answer
83 views

Contradiction in information resources on capturing UV light with a digital sensor [duplicate]

I encounter a contradiction. Many resources state that a digital sensor are unsensitive to UV light. Even wikipedia, "However, newer photographic film and digital cameras are highly insensitive to ...
1
vote
4answers
125 views

Can exposure parameters be kept high even at high ISO sensitivity, to keep image quality up?

Following is from Film speed Film speed is the measure of a photographic film's sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ...
-3
votes
3answers
2k views

Which is better: a smaller f-number lens or a bigger sensor size?

When choosing a camera, which of the following options would be the best in taking photo in low light situation and cropping photo situation? A smaller f-number lens with a bigger sensor size A ...
1
vote
1answer
115 views

Why is a camera's dynamic range expressed as its photosite capacity divided by the read noise level?

For example, if a camera has a dynamic range of 44900/10, why would the range of greyscale levels available is equal to 4490? I know that 44900/10=4490 but this kind of reply didn't satisfy me. Let's ...
0
votes
0answers
39 views

Does a smaller sensor give shallow depth of field? [duplicate]

I have read that a full frame sensor gives a more shallow depth of field if using the same lens as on a crop frame sensor. Is this true? What I actually want to know is how does this relate to a point ...
5
votes
3answers
798 views

How are pixel value and intensity related?

How does the value of a pixel at any point correspond to the intensity of light photons striking at that point? Is there any mathematical relation between these two? 1 pixel value = ?? lumen.
1
vote
2answers
705 views

is a camera sensor size cropped according to the change in pixel aspect ratio of a resolution?

As an example, canon 6d full frame has the highest resolution of 5472 x 3648 with a pixel aspect ratio of 3:2 . As this is the highest I assume this is utilising the full size of the sensor. If the ...
0
votes
1answer
129 views

What does “MECHA DEVICE SERVICE” mean in a Sony repair listing?

My Sony A7 just came back from the repair with a listing that this part was changed out: A1976128A — described as "MECHA DEVICE SERVICE". Any idea what it is? I'm guessing it's the sensor, but it's ...
5
votes
8answers
2k views

What is Snapsort's “true resolution” score?

On Snapsort I found this explanation: True resolution Manufacturers advertise high megapixels to sell their cameras, Snapsort calculates the true resolution of each camera based on the ...
3
votes
2answers
182 views

Are these weirdly-shaped purple stains really from particles under the first layer of the sensor, and if so, what can I do about it?

I have those little particles on my pictures. There are a lot of them, as you can see, and they have different weird shapes: I already sent my camera for a sensor cleaning and the guys at the shop ...
16
votes
5answers
1k views

Might future advances in sensor technology reduce or eliminate noise?

Is there a possibility that future tech advances may reduce or eliminate the noise when using high ISO setting, or is this noise unavoidable and inherent to all digital sensors? If there is a ...
6
votes
2answers
450 views

What are these strange lines on images from my Fujifilm FinePix F850EXR?

My camera recently started displaying lines on captured images along with some discoloration (you don't see the lines or any discoloration when simply looking through the lens). There was no ...
1
vote
1answer
72 views

Same mfg process = same performance in FF vs. cropped sensor?

I've seen generalizations that full-frame sensors tend to exhibit better low-light performance and dynamic range than a cropped-sensor specifically because they tend to use larger photosites that ...
12
votes
3answers
4k views

How relevant are the DxOMark scores and tests?

To me the DxOMark sensor rating seems a bit bizarre. They recently rated the sensor of Nikon D3300 to the same score as the Canon 1Dx got which I find unlikely to reflect their performances, and which ...
7
votes
7answers
1k views

Does a larger sensor resolution increase the difficulty of shooting hand-held?

I'm thinking of upgrading to a D800 and I think I read something about the 36MP resolution of the sensor to be a liability when hand-holding the camera at lower shutter speeds. Unfortunately I cannot ...
6
votes
2answers
1k views

Are there digital cameras with a RGBW sensor?

I have seen on Dpreview that fujifilm has been granted a patent for a new type of sensor with a strange non-Bayer pattern. Thinking about it... Is there a camera using a simpler Bayer RGBW pattern? ...
8
votes
5answers
556 views

Why are there no rotatable sensors instead of grips for portrait photography?

Why are there (at least to my knowledge) no rotatable sensors instead of grips for portrait photography. It seems like a great solution to obtain a lightweight DSLR for both landscape and portrait ...
4
votes
7answers
1k views

Why don't sensors have a wider aspect ratio?

than 3:2, like 16:9 or 16:10? Given the popularity of widescreen TVs and computer monitors with wide aspect ratios, and that most photos are viewed on a screen, rather than printed, and that the eye ...
1
vote
1answer
183 views

What are the main limiting factors for dynamic range in modern cameras?

Another question got me thinking about what is limiting dynamic range in digital cameras. From my understanding the precision of the analogue-to-digital converter, i.e. how many discrete levels it can ...
2
votes
1answer
125 views

Does a deeper photosite increase the dynamic range?

As I understand, a bigger photosite (on the sensor) enables a bigger dynamic range and also better high ISO performance. Is there a reason not to make the photosite deeper?
3
votes
2answers
3k views

Nikon D5100 half bright-half dark image with horizontal thin black line

I am getting half bright-half dark image with horizontal thin black line on my Nikon D5100. Does anyone has any idea ? i am extremely worried. Warranty just expired. I have sample images uploaded at ...
0
votes
2answers
132 views

why is a compact sensor brighter than a APS-C size sensor

So I may be missing something but I cannot think what it can be. I have a Sony compact hx9v and an NEX-6. the 16mm on the NEX is very similar to the compact at its widest, so I thought I would ...
5
votes
2answers
785 views

Convert RGB camera to infrared, but 3 channels not just 1?

A common way to make an infrared camera is to remove a commodity camera's IR-blocking filter (and add another filter to block the visible spectrum). Is there a similarly cheap way to convert an RGB ...
0
votes
3answers
127 views

A/D conversion, processors marketed less actively than sensor characteristics?

In most literature about digital photography, there is some info-graphics about the path of the light signal from sensor to the storage. It starts with sensor, then there is the ...
2
votes
2answers
462 views

Sony A7R Noise compared to Nikon D800/E Sample Explanation

I am looking for a high resolution camera for fine art prints and the Sony A7R seems great since it has the same Sensor res as the D800 in a smaller enclosure. For some reason when I look at sample ...
8
votes
2answers
365 views

What are the lens-mount benefits of mirrorless systems?

There are plenty of comparisons between DSLR cameras and mirrorless/EVIL/system cameras, and the overall picture is that the two systems target different users and different uses. But I'd like to ...
4
votes
1answer
188 views

What is the benefit of the sensor marker?

I know that this marker on my Canon EOS shows me where my sensor is: Form technical point of view this is interesting, but is there benefit for me as a photographer to know exactly on which level ...
2
votes
1answer
803 views

What is the precise definition of SNR, as used by DxOmark?

What is the precise definition of signal to noise ratio, as used by DxOmark? Please see here, after clicking Measurements, SNR 18% (it's not directly linkable). I am looking for an explanation (in ...